Transcriptional Reprogramming during Effector-to-Memory Transition Renders CD4(+) T Cells Permissive for Latent HIV-1 Infection.

Transcriptional Reprogramming during Effector-to-Memory Transition Renders CD4(+) T Cells Permissive for Latent HIV-1 Infection.
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效应器到记忆转变过程中的转录重编程使 CD4 T 细胞允许潜在的 HIV-1 感染

DOI:
10.1016/j.immuni.2017.09.014
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发表时间:
2017-10-17
期刊:
影响因子:
32.4
通讯作者:
Siliciano RF
Siliciano RF
中科院分区:
医学1区
文献类型:
--
作者:
Shan L;Deng K;Gao H;Xing S;Capoferri AA;Durand CM;Rabi SA;Laird GM;Kim M;Hosmane NN;Yang HC;Zhang H;Margolick JB;Li L;Cai W;Ke R;Flavell RA;Siliciano JD;Siliciano RF

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静息记忆中的CD4+T细胞中潜伏的HIV-1储存库是治愈HIV-1感染的主要障碍。对HIV-1潜伏感染的研究主要集中在对潜伏感染细胞中病毒基因表达的调节。然而,目前尚不清楚感染最初是如何变得潜伏的。在这里,我们描述了经历效应到记忆转变的CD4+T细胞的一组独特的特性,包括CCR5表达的暂时上调和细胞基因转录的快速下调。这些细胞允许通过整合完成HIV-1生命周期的各个步骤,但抑制了HIV-1基因的转录,从而允许建立潜伏期。这一阶段的CD4+T细胞比其他CD4+T细胞对HIV-1潜伏感染的容忍度要高得多。病毒特异性CD8+T细胞可以抑制在CD4+T细胞中建立潜伏的HIV-1感染,这一结果对T细胞疫苗消除潜伏的HIV-1感染具有重要意义。HIV的潜在蓄水池是治愈的障碍,但鉴于HIV通过进化逃避免疫反应的能力,目前尚不清楚为什么HIV会建立潜伏期。Shane等人。表明潜伏期是在激活后的狭窄时间窗口内感染CD4+T细胞的不幸后果。
The latent reservoir for HIV-1 in resting memory CD4+ T cells is the major barrier to curing HIV-1 infection. Studies of HIV-1 latency have focused on regulation of viral gene expression in cells in which latent infection is established. However, it remains unclear how infection initially becomes latent. Here we described a unique set of properties of CD4+ T cells undergoing effector-to-memory transition including temporary upregulation of CCR5 expression and rapid downregulation of cellular gene transcription. These cells allowed completion of steps in the HIV-1 life cycle through integration but suppressed HIV-1 gene transcription, thus allowing the establishment of latency. CD4+ T cells in this stage were substantially more permissive for HIV-1 latent infection than other CD4+ T cells. Establishment of latent HIV-1 infection in CD4+ T could be inhibited by viral-specific CD8+ T cells, a result with implications for elimination of latent HIV-1 infection by T cell-based vaccines. The latent reservoir for HIV is a barrier to cure, but it is unclear why HIV establishes latency given its ability to evade immune responses through evolution. Shan et al. show that latency is an unfortunate consequence of infection of CD4+ T cells within a narrow time window after activation.
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